def demo():
    num1 = 100
    num2 = 0
    try:
        print(num1 / num2)
    except:
        print('1111111111111111111111111111111111111111111111111')

def demo2():
    print('开始')
    try:
        demo()
    except:
        print('222222222222222222222222222222222222222222222')
    print('结束')
demo2()